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"frequency" in Chinese : n. 1.屢次，頻仍，頻繁。 2.(脈搏等的)次數(shù)，出現(xiàn) ...
"shift" in Chinese : vt. 1.變動(dòng)；改變；搬移；移動(dòng)；轉(zhuǎn)移；變換；替換；更 ...
"keyer" in Chinese : n. 1.【無(wú)線(xiàn)電】電鍵器；鍵控器；調(diào)制器；控制器。 2 ...
"frequency shift keyer" in Chinese : 頻率鍵控器; 頻率轉(zhuǎn)換開(kāi)關(guān); 移頻鍵控器
"frequency keyer" in Chinese : 頻移鍵控器
"frequency shift" in Chinese : 頻率偏移頻移; 移頻
"frequency-shift" in Chinese : 頻率偏移; 移頻,調(diào)頻
"shift frequency" in Chinese : 漂移頻率; 移頻
"keyer" in Chinese : n. 1.【無(wú)線(xiàn)電】電鍵器；鍵控器；調(diào)制器；控制器。 2.定時(shí)器，計(jì)時(shí)器。
"narrow shift frequency shift keying" in Chinese : 窄移頻鍵控
"audio frequency shift keying" in Chinese : 聲頻移頻健控
"audio frequency shift modulator" in Chinese : 聲頻移頻調(diào)制器
"audio-frequency shift modulation" in Chinese : 音頻頻移調(diào)制
"audio-frequency shift modulator" in Chinese : 聲頻位移調(diào)變器
"binary frequency shift keying" in Chinese : 二進(jìn)制移頻鍵控

Afsk for audio frequency - shift keying
音頻頻移鍵控
Fsk for frequency - shift keying
頻移鍵控
In this paper , bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming . the use of error - correct codes provide a way to improve the performance of frequency hopping system , particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system . so we provide the way of coding and decoding of rs code in c language . in the end , we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels
第一章為緒論，敘述跳頻通信的發(fā)展趨勢(shì)，以及基本概念，第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯(cuò)碼reed - solomon碼的原理和實(shí)現(xiàn)方法。第四章研究跳頻通信系統(tǒng)在各種干擾條件下的性能。最后在第五章以fh mfsk系統(tǒng)為例，探討在部分頻帶干擾下的系統(tǒng)性能，并進(jìn)行計(jì)算機(jī)仿真，仿真結(jié)果表明采用分集技術(shù)和各種編碼技術(shù)對(duì)于系統(tǒng)的性能改善具有明顯的效果。